Greetings,For some reason some of my add on planes are not showing up in FSX even in when the "show all variations" is checked. What can be done to fix this? aircraft cfg file tweaking?Thank You for your help.

Yes It's for sure in the CFGs that there are misstakes. Check I few things, the the texture name matches the one in the CFGthat its a FSX aircraftthat the panel says fltsim alias=B737_800 and not 737_400 and same goes for the sound file

Greetings,For some reason some of my add on planes are not showing up in FSX even in when the "show all variations" is checked. What can be done to fix this? aircraft cfg file tweaking?Thank You for your help.

That usually indicates some kind of problem with the aircraft.cfg file like duplicate names or something missing.

Greetings,For some reason some of my add on planes are not showing up in FSX even in when the "show all variations" is checked. What can be done to fix this? aircraft cfg file tweaking?Thank You for your help.

Provide the exact, complete filename of one of the files you downloaded which is not displaying so one of us can check it out and see what the problem might be.